LED display module installation structure and high-precision weighing device

Abstract

The utility model belongs to the technical field of high-precision weighing devices, and provides an LED display module installation structure and a high-precision weighing device.The LED display module installation structure comprises a PCB, an LED lampshade and a diffusion film, and lamp beads are arranged on the front face of the PCB; the LED lampshade is arranged on the front face of the PCB, the LED lampshade and the PCB are provided with a first installation hole and a second installation hole which are matched with each other respectively, and self-tapping screws are arranged in the first installation hole and the second installation hole in a penetrating mode. A back glue layer is arranged on the back face of the diffusion film, the diffusion film is attached to the front face of the LED lampshade through the back glue layer, and the front face of the LED lampshade is attached to the ITO glass. According to the body fat scale, the front surface of the diffusion film is directly attached to the ITO glass, so that the display effect of the reading of the body fat scale is improved; and meanwhile, the stress area of the pressure sensor, the stress center point of the supporting area and the center point of the wafer are all on the same straight line, so that uniform stress can be ensured, and the accuracy of data output by the pressure sensor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision weighing devices, and in particular to an LED display module installation structure and a high-precision weighing device. Background Art

[0002] At present, electronic body fat scales are generally made of ITO conductive glass, and the display of the measured readings is realized based on LED modules. The LED module includes lamp beads, LED lampshades and diffusion films, wherein the diffusion film is generally provided with adhesive layers on both sides, wherein the front side of the diffusion film is adhered to the ITO conductive glass through the adhesive layer, and the back side of the diffusion film is adhered to the LED lampshade through the adhesive layer.

[0003] The diffusion film is provided with adhesive layers on both sides, which increases the distance between the front side of the diffusion film and the ITO conductive glass, causing the front display effect of the LED to be easily shadowed, resulting in poor reading effect when the user observes the indication on the front side of the ITO conductive glass. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides an LED display module installation structure and a high-precision weighing device to solve the problem that the front and back sides of the diffusion film in the current LED module are both provided with glue layers for assembly, resulting in poor LED front display effect.

[0005] In a first aspect, the utility model provides an LED display module installation structure, comprising:

[0006] A PCB board, wherein a lamp bead is arranged on the front side of the PCB board; and a locking hole is formed on the PCB board for connecting with the housing;

[0007] An LED lampshade is arranged on the front side of the PCB board; the LED lampshade and the PCB board are respectively provided with a first mounting hole and a second mounting hole that cooperate with each other, and self-tapping screws are penetrated through the first mounting hole and the second mounting hole;

[0008] A diffusion film, a back surface of which is provided with a back adhesive layer, the diffusion film is attached to the front surface of the LED lamp cover through the back adhesive layer, and the front surface of the diffusion film is bonded to the ITO glass.

[0009] It can be seen from the above technical scheme that the utility model provides an LED display module installation structure, in which the LED lampshade and the PCB board are locked by self-tapping screws, the diffusion film is attached to the LED lampshade, and then the LED module is installed on the shell by setting screws in the locking holes on the PCB board, thereby achieving direct adhesion between the front of the LED lampshade and the ITO glass, thereby ensuring the display effect of the LED.

[0010] Optionally, a positioning column is formed on the back of the LED lampshade, and a positioning hole is formed on the PCB board in cooperation with the positioning column, and the positioning column and the positioning hole are interference fit. The positioning column of the LED lampshade provided by the utility model and the positioning hole of the PCB board can achieve pre-positioning, which is convenient for subsequent installation based on the locking hole.

[0011] Optionally, the locking hole is located on one side of the PCB board, a groove is formed on the other side of the PCB board, a first hook is formed on the housing, and the groove and the first hook are arranged in cooperation. To improve the installation effect of the LED module and the PCB board, a locking hole is formed on one side of the PCB board, and a groove is formed on the other side of the PCB board and cooperates with the first hook of the housing to improve the assembly effect.

[0012] In a second aspect, the utility model provides a high-precision weighing device, comprising an LED display module mounting structure of any possible implementation of the first aspect, and also comprising an upper cover, wherein an ITO glass is attached to the front of the upper cover.

[0013] Optionally, an assembly hole matching the locking hole is provided on the back side of the upper cover, and a screw is provided between the locking hole and the assembly hole.

[0014] Optionally, a pressure sensor is further included, the upper cover is provided with a mounting groove, a second hook is formed on the mounting groove, and the pressure sensor is installed in the mounting groove through the second hook.

[0015] Optionally, the force-bearing area of ​​the pressure sensor, the force-bearing center point of the supporting area and the center point of the wafer are all on the same straight line.

[0016] Optionally, a plastic foot pad is further included, in which a third hook is arranged, and the third hook is used for assembly and connection with the pressure sensor.

[0017] By adopting the above technical solution, this application has the following technical effects:

[0018] The utility model provides an LED display module installation structure, in which the LED lampshade and the PCB board are locked by self-tapping screws, the diffusion film is attached to the LED lampshade, and then the LED module is installed on the housing based on screws arranged in the locking holes on the PCB board, so that the front of the LED lampshade and the ITO glass are directly attached, thereby ensuring the display effect of the LED;

[0019] The utility model first assembles the plastic foot pad and the pressure sensor through the third hook formed on the plastic foot pad, and then limits the upper cover and the pressure sensor through the second hook formed on the upper cover, thereby limiting the position of both the plastic foot pad and the pressure sensor, and the assembly efficiency is higher;

[0020] The force-bearing area of ​​the pressure sensor of the utility model, the force-bearing center point of the supporting area and the center point of the chip are all on the same straight line. The pressure sensor is evenly stressed, avoiding the situation where the pressure sensor is uneven in the hand and thus affecting the output data, thereby improving the data accuracy of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 A schematic diagram of a PCB board and an LED lampshade of an LED display module installation structure provided by an embodiment of the utility model;

[0023] Figure 2 An exploded schematic diagram of an LED display module installation structure provided by an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the back side of a PCB board provided in an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the back side of an LED lampshade provided by an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of an upper cover provided in an embodiment of the utility model;

[0027] Figure 6 A schematic diagram of the assembly of a PCB board and an upper cover provided in an embodiment of the utility model;

[0028] Figure 7 An exploded schematic diagram of the assembly of a pressure sensor provided by an embodiment of the utility model;

[0029] Figure 8 A schematic diagram of force analysis of a pressure sensor provided in an embodiment of the utility model.

[0030] Reference numerals:

[0031] 1-PCB board; 11-lamp bead; 12-first mounting hole; 13-locking hole; 14-groove; 15-positioning hole; 2-LED lamp cover; 21-second mounting hole; 22-positioning column; 3-diffusion membrane; 4-upper cover; 41-assembly hole; 42-first hook; 43-mounting slot; 431-second hook; 5-ITO glass; 6-pressure sensor; 7-plastic foot pad; 71-third hook; 8-anti-slip foot pad. DETAILED DESCRIPTION

[0032] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Example 1

[0038] like Figure 1-3As shown, this embodiment provides an LED display module installation structure, including a PCB board 1, an LED lampshade 2 and a diffusion film 3, wherein a lamp bead 11 is arranged on the front of the PCB board 1; a locking hole 13 is formed on the PCB board 1 for connecting with the housing; the LED lampshade 2 is arranged on the front of the PCB board 1, and the LED lampshade 2 and the PCB board 1 are respectively provided with a first mounting hole 12 and a second mounting hole 21 which cooperate with each other, and self-tapping screws are arranged through the first mounting hole 12 and the second mounting hole 21; a back adhesive layer is arranged on the back of the diffusion film 3, and the diffusion film 3 is attached to the front of the LED lampshade 2 through the back adhesive layer, and the front of the diffusion film 3 is bonded to the ITO glass 5. Based on the above structure, by bonding the back of the diffusion film 3 to the LED lampshade 1, and then connecting the assembled PCB board 1, LED lampshade 2 and diffusion film 3 to the housing through the locking hole 13, the front of the diffusion film 3 and the ITO glass 5 are directly bonded, thereby improving the display effect of the body fat scale.

[0039] Specifically, the material of the LED lampshade is ABS, and the wall thickness is 1.5mm, and the wall thickness is uniform to prevent light leakage; the height is 3.5mm to reduce the light transmission distance. The diffusion film is formed with a light-transmitting area and a non-light-transmitting area. The body of the diffusion film is white PET that is light-transmitting, with a wall thickness of 0.125mm, and the non-light-transmitting area is printed in black. The adhesive layer model of the diffusion film is 3M7533.

[0040] like Figure 4 As shown, a positioning column 22 is formed on the back of the LED lampshade 2, and a positioning hole 15 is formed on the PCB board 1 in cooperation with the positioning column 22, and there is interference fit between the positioning column 22 and the positioning hole 15. In this embodiment, the positioning column 22 of the LED lampshade and the positioning hole 15 of the PCB board 1 are cooperated to achieve pre-positioning, which is convenient for subsequent installation based on the locking hole 13.

[0041] Specifically, the diameter of the positioning column 22 gradually decreases from top to bottom, and the inner diameter of the positioning hole 15 also gradually decreases from top to bottom.

[0042] like Figure 1 As shown, the locking hole 13 is located on one side of the PCB board 1, and a groove 14 is formed on the other side of the PCB board 1. Figure 5-6 A first hook 42 is formed on the housing, and the groove 14 cooperates with the first hook 42. Based on this, the installation effect of the LED module and the PCB board 1 can be improved. The locking hole 13 is formed on one side of the PCB board 1, and the groove 14 is formed on the other side of the PCB board 1 to cooperate with the first hook 42 of the housing, thereby improving the assembly effect and ensuring the assembly reliability.

[0043] Example 2

[0044] This embodiment provides a high-precision weighing device, including the LED display module installation structure provided in embodiment 1, such as Figure 5-8As shown, the housing of the high-precision weighing device includes an upper cover 4 , an ITO glass 5 is attached to the front of the upper cover 4 , and the back of the ITO glass 5 is directly attached to the front of the diffusion film 3 .

[0045] like Figure 5-6 As shown, the back of the upper cover 41 is provided with an assembly hole 41 that matches the locking hole 13, and a screw is provided between the locking hole 13 and the assembly hole 41. Specifically, after the pre-assembly of the PCB board 1, the LED lamp 2 cover and the diffusion film 3 is completed, the assembly of the PCB board 1 and the upper cover 4 is completed based on the locking screws passing through the back of the PCB board 1.

[0046] Specifically, the upper cover 4 is provided with a mounting groove 43, and a second hook 431 is formed on the mounting groove 43. The pressure sensor 6 is mounted in the mounting groove 43 through the second hook 431. The pressure sensor 6 is assembled and connected with the plastic foot pad 7 through the third hook 71. Figure 7 When assembling, first assemble the four pressure sensors 6 with the plastic foot pad 7. The plastic foot pad 7 has two third hooks 71 formed therein, and fixes the two third hooks 71. Figure 8 The shaded area of ​​part (a) is matched and set; then the anti-skid pads 8 made of silicone are respectively attached to obtain the pre-assembled parts, and finally the pre-assembled parts are installed on the installation groove 43 and limited by the second hook 431. This assembly method makes the product more accurate and easy to assemble. The anti-skid pads 8 can improve the adsorption capacity of the high-precision weighing device and the ground, and improve the accuracy of the read data.

[0047] See also Figure 8 , the force-bearing area of ​​the pressure sensor 6, the force-bearing center point of the supporting area and the center point of the wafer are all on the same straight line. Figure 8 The shaded area in part (a) is the force-bearing area of ​​the pressure sensor, and the force center point of the force-bearing area is point B; Figure 8 The shaded area in part (b) is the mounting support area of ​​the pressure sensor for assembly, and the force center point of the support area is point C; Figure 8 The shaded area in part (c) is the wafer area of ​​the pressure sensor, the center point of the wafer area is point D, and points B, C and D are on the same straight line. Based on this, the situation where the pressure sensor 6 is subjected to uneven force and thus affects the output data is avoided, thereby improving the data accuracy of the sensor.

[0048] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. An LED display module installation structure, characterized in that: include: A PCB board, wherein a lamp bead is arranged on the front side of the PCB board; and a locking hole is formed on the PCB board for connecting with the housing; An LED lampshade is arranged on the front side of the PCB board; the LED lampshade and the PCB board are respectively provided with a first mounting hole and a second mounting hole that cooperate with each other, and self-tapping screws are penetrated through the first mounting hole and the second mounting hole; A diffusion film, a back surface of which is provided with a back adhesive layer, the diffusion film is attached to the front surface of the LED lamp cover through the back adhesive layer, and the front surface of the diffusion film is bonded to the ITO glass.

2. The LED display module installation structure according to claim 1, characterized in that: A positioning column is formed on the back of the LED lamp cover, and a positioning hole is formed on the PCB board to cooperate with the positioning column, and the positioning column and the positioning hole are interference-fitted.

3. The LED display module installation structure according to claim 2, characterized in that: The locking hole is located on one side of the PCB board, a groove is formed on the other side of the PCB board, a first hook is formed on the shell, and the groove and the first hook are matched.

4. A high-precision weighing device, characterized in that: It comprises the LED display module installation structure as described in any one of claims 1 to 3, and also comprises an upper cover, wherein the front side of the upper cover is attached with ITO glass.

5. The high-precision weighing device according to claim 4, characterized in that: The back side of the upper cover is provided with an assembly hole matched with the locking hole, and a screw is penetrated between the locking hole and the assembly hole.

6. The high-precision weighing device according to claim 4, characterized in that: It also includes a pressure sensor. The upper cover is provided with a mounting groove, a second hook is formed on the mounting groove, and the pressure sensor is installed in the mounting groove through the second hook.

7. The high-precision weighing device according to claim 6, characterized in that: The force-bearing area of ​​the pressure sensor, the force-bearing center point of the supporting area and the center point of the wafer are all on the same straight line.

8. The high-precision weighing device according to claim 7, characterized in that: It also includes a plastic foot pad, in which a third hook is arranged, and the third hook is used for assembly and connection with the pressure sensor.

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